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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d00c056ed34da55a2a2b9392ecef220ce6c69246ebd619c9fa19dd0bf80b562' 
  AND token = 'OJq5THoQCZogOSJ7gpYGHLGoxwIKrPWmI7PE5XBadsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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