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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ff06decabed4413fefd2039fca22d11cd3b2a3f6090592f3febd9a61257803ec' 
  AND token = 'F7t8mD3ypn4you/YiAmAN4kIsJIxN8quRbBBg2hktc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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