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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dc9a82e3b7853ea151ca5d41fb22ddb4e33cd6d3f8bea3480887d42c6f08e5f4' 
  AND token = 'GaGyeOC6huorZ4T0ag2vhUuPCTpxT07jM5XObHmlAXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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