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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad6004c3324ef6eb0962bfc8f84e65e1b6751188c2b91243b02f883a5105771f' 
  AND token = 'q+s3A27K6BXivoiLR5zIffx6s2DFfQQWoafVc5p9d3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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