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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2a5d2c4658ba26411f6625eeb29088f495eebca20908720035c63d16ed8655bf' 
  AND token = '7LmhDpb/dTz79S9lMfmycHF6MFzfK4DbBEOtkHikf/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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