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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63196bf5c8b7be26e1b6d0f716d4a4fa78f2e989b7a56e6c7be6c7f8ef2e6d3c' 
  AND token = 'rKix+PJBeAPqjEiQrK62Pu5S5u3bGJresHntR48YErY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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