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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3b213909ff8f5b648e9391cdf7a061a1461b440eaf3982ecb6589dcbdca8dc4' 
  AND token = 'M/YftXR1F3hE97m9lHVhinhjosdvHxU2UrNZa1Phg5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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