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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e5de061d0186d0fa1a8e602a7cc5c5b935a831b9375734a678bbd17e1020213c' 
  AND token = '22P6CfFFgT/4tCircv+NVpCtVDfNTfxRRJbe2OEKsl4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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