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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33753eaad8c0cfeaa97299c059c4a19a1efd6aced37e637c1adcedce7556439f' 
  AND token = 'Dnl0uaMM1Dv8Tb8u65TzBR3TDA4DKC5ZTDx+Lutrcpc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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