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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4c02ebd600dee90a3d10b7b7eead796c7485b249e33ad105d65836d414bfb82d' 
  AND token = 'b5glTNOd7sFM5c2HLaWkCTG1GUjBxUl7q1wbOmO6zbU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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