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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07545ea73ec9093ba388945ff5ccbb473e3cc0d05779c73b8a29d88c5106c51e' 
  AND token = 'nC2u7CQnrC5bXSjWebECXOqxyCyX7io2BXXN0N1WfW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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