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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54894917ba9b031df7960ad0737ef5204d31775403dde3e99e71b6c8eb9c36f5' 
  AND token = '0Ll0QM6ejaYsAnJeR5atVyI06tEz4/PQO6VhqFHA8yA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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