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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9142de2bf5c2bbc9c444bd976343da44828628c76763164d38b2c0de74b16b7b' 
  AND token = 'Wa8yhMZj0uXk7YTTpq77ZV6sjkVywcNjtMknJg2Vxkw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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