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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd13c8189f5bb5e64d65f93f7a1815236e19e84dc604cfe440871f5a27a5bbe0a' 
  AND token = 'oLSH8GM3+NKb4Os9PImgNT9EQPDppFoBRl3PUVg4j4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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