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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc0cd42f66404daef98d2ac98b7303ce9e2857b7aa000d94a47b2d12ad108034' 
  AND token = 'Og0cf/3U0AdrNcPmF3JtArsJ0hevaejgMc69ANydezQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00080

JSON explain

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