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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2e95c795da949e11d9f409778d1a46751c2cc32a7790e96ec33dc4f259127ed6' 
  AND token = 'bmeN8FtPlcXQgg5YMfRtudV/xGjEBauNDPQS7vLX2XA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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