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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3ee05969c0c83cb73d70755dc5f09995edc83b27fd95a59d754c2791bbd2e06d' 
  AND token = 'rnROeTHPn3zcsBpakvynb/vSW5r9NM8uLs5muTK1Ifc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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