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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0db97a5b5b412b21a50ccab99cf57ae9729273ccbb9cdc5a3cc2d88b0e0c39c' 
  AND token = 'TBIyQF5xRCUFeNhwDXHiTWwHB7H6x17jX2+tLN70mq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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