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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '189fec9a128bce54e06c8c42f29c5e62bf654c3eecb15b35f795d6dfbedf1145' 
  AND token = 'hgua3vwjFfPALTt0eys4Y8vCN3Mi9IGucAVjRNdESe4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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