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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '549906e4ea73737526d9820c15bf4e4cc99ef6ca05327ae2445098ae9fccb903' 
  AND token = '4QzFRCsG3P2aOF1+ULkadkdvBOcUeIsZdGRtlbAH66s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}