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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10635fd43c56bd7159dc17e38e4fc65b62baa954ee194b5e1148abf3e8a60001' 
  AND token = 'yC7oJ9xa+9ID18d9Wnf8Ghyb235f5gBNDdNnJImYQ94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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