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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd2f4ccc6fa7103becd9e6e0fba49bd8b0dc6f5d1d99fcbd9fe14b884baaaaf6f' 
  AND token = 'o4V9jobIwnIGI5oy8qPhVN+quq2jNOePx0lfz8xdU20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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