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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5151c7c4694d95cd9af6909de10dd369b408b168b94d7c003a561f366ec9c047' 
  AND token = 'v1zA9j6Vd7xGgzAhcsApY9saX1s84KWJ2FcYaT8hfZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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