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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7fa786f95b6cedad6325f68f651513bf27b7fda368392cd79bacf4a316a8dea' 
  AND token = 'l2UY79LV52xF9jOyk1cz0Nd0vxNLbFtsfRab0iy+V6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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