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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f1a01f23ea180b97f9860baccf1f90d8178772716acd814ed93ca7496d1f7e0' 
  AND token = 'lEzo91j28UxaP5rq//flK6GPV0/KXBMnYkTc0n5Jyaw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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