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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2d99148b6d845fb4e7a2b1a0b7df8c4e28b05d5d03b60707fefa6f189502ed9e' 
  AND token = '/5tZt5rvxjdKxzm8eO3DifxfbSlNtfV5LwbVX11upUs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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