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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cd381eb23c73b2b176bc7e07cb63eafdd4a73cf0dcdcb823b0b00aaec2dc2ea3' 
  AND token = 'ijNvJMs0TSPYWKZ3XOwJpOHhpYY0MOLxjDN+dd71dq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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