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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '449258ce6c40b9fcf9267a1d443e0b915c6b924aca7423570954751ace69e544' 
  AND token = 'ByM+k2Op6WVupfPaLRn9YRmTup9/NJWe68GZqeTELXU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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