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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c83d0c69d73cd3a82413414457d8b3b5e2b7034563d0438fbb4d88405435b6e' 
  AND token = 'jvyQZXABpnXOTe4Q/mhFknM6q3YfytFSBKVs+HRsb48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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