Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2e5313aa395879bc0d3925db3a1ce23c127ada656102ad26b3a8dd046873cbd' 
  AND token = 'GV3STXumXAtveTagpwWQYNSCaFQz9zd1acDiioUZn40=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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