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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ccdef2b41c45a3f19dc30804e9a6a95da78d6930cc38035b9820a7200ed2eaf' 
  AND token = '3g+2mM8Wg1EByPg8+LTWuB2aOmXsPcwisDYWxgKokTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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