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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07a37a16baee94a1833c1575c6f40759ecbb9ec8dc5cb242c359a0482f97680a' 
  AND token = 'vC/2yBjG/lpLHSr1LbDuT9NKa98W8AiLfFkCmSK6K0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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