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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c14be19ecf8c3a7393eb40cb8364049ebcd477d7dbcce16abd046b614c9944bf' 
  AND token = 'PHGwSXmswq2ALI2hgbFx/kIz9kSCW70iJwbCQJxWRxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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