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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ede45412d82420719828560a75eaf2abe53f40d0a067d353d19aff4d02e56806' 
  AND token = 'AqT1VOq3jlur6oll6HG40s+sdKIMcGMJFilXEaqv6V0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}