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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '217dceba2898623294c54603e4a8cfc7a088590798ab2143a664f0e1e0751175' 
  AND token = 'PSd/cZtpCLUPNtScwcD4oH/k/xyP6HzIxw2mdw/AnFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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