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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd0d80c6fc9c2cf2bd584cca23632fd61bde94e621de5060df8672a85f4fc2817' 
  AND token = 'orUj1OvRbWee5JmL7XszEbOWjuL1+H54fcH1bszhN4Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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