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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3bfe03c74499a8cc78cd7e93917e481806932d159abe0d991f343a9edfb8dcb' 
  AND token = 'Be2d8aBO0Oeu2SagmBUSz4VFfv/THbJq8A3rxqbg5XA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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