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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7712949d5fdfe798196189a6ec2a54a0a75453304c6ebfb184d39e15c1d0472' 
  AND token = 'ne9OK/kMRznwsgaRaM6/DLcuJ4J5zLqO9yegXIPCHeA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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