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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbdba65b58439edf6e08b8c36fb22e740d907f4e2cdbfb269caa5031d14ae6f9' 
  AND token = 'lNKOPnhl5yJVKyGvxUoTppWJiXcEk6Q1QzholggktSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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