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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9d13257aa2f30e1368a9de6a7e6d9ca37e1ec25fc30bf7c566c8c9cfe1091257' 
  AND token = '5cSuqA93EAas3S3/ui0UYBqBErDL06IppNgjJu2rePc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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