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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c9d84926619178ec7690092e6b0136ad6e245261ae998bf06a977938a1625ea' 
  AND token = 'KlAATe8YTA6cgXHQCMbUInoJ/s1DvD/2m2/hLN7gP0Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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