Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0954e732d301987e8ab4a560deb62745aeaa992097fe4a52ebedec905648331d' 
  AND token = 'R1x9uPNaRG6czdpNia2iJ3E2N6q27IfTt3W12vO9KME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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