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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '965be3a801ae9966d3fc3eb86b36166cef27fbdc7929f716676c07f7b8d65d7d' 
  AND token = 'VwUdBOUu05Eg7ISE/htCqBEOi51P+M6mrQ9a4C1aSxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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