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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '925e38a30346e7fac975e0f95fc691df0f9e2e3023a2bbfde1ee03beb4ebcb32' 
  AND token = 'FpG9qoMQeBkC8AuT/keQ1dBztB6mwJK1SqnGR5LFqTk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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