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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0f83339c0f24b8aa7c711c56ea31438d41babb7a1fd083eb8fb8ef9d58e0dd64' 
  AND token = 'reVv+1iBArvs73ojaP5OO/pgJMfij6m9HUV/j7szp8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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