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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '007d8409da23549ff5b2aaac3cb3a33a0bc71ae96897cf73b208a5b125c1e1fe' 
  AND token = 'Q6LFoezYINzuE7fXQOi2SVB2wNsJSGQ76jjYKKQGTlQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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