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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f32dc5bebe8513f9b0359e1979f13f8d5b98499ffa44bb0ac0227e3f5918411d' 
  AND token = 'jTJ5bqizpN+TFs6owvpd+WvkrEkcK9Uafi597zFEjSg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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