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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '66140a5efa953d43c95836b34aaf125c8c876682e2005dab33b19d8107f27c77' 
  AND token = 'HA0MUmoNmnuz06/+UX8C1Cy2FvaMPKT9W85b0g0dAa8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00114

JSON explain

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