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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5bd20ee9fdb7a2d9afe3978c49253a50ac6de8117cf311d89ba5d5b9fe0aa6c7' 
  AND token = 'W4dgskSSMx1Z6jhLD7Wss5a1mqigZRiDC9YbEqnszFc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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