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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '72221597541b26f4c3e394f55b0dcd8a17f0f8409647fba5487f10fee503fffa' 
  AND token = 'cLDIsfj7eYzfPwJVazwS2pLc3ljkX2DGyhNJPwNpnkM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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