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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0562247f7511d2c3a617621b31a23d5d6db4eb0ab13dd0f1630d6f1a314bc61e' 
  AND token = 'LOtrLg13vqyTHKtftrsSZtyr0s8NGwxnyk6d3VynC5s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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