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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f84dd5dc5f4a2b1b73fd57a98abcd37683ba60f2aa130d6f2b8014cba5325028' 
  AND token = '2bDgLOolXdVB/N43skdfDYaB88q3zhJPuksucc13A8Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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