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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05b69b1e6cc6f142a00fe2157b9a7be77b3ba3c3e68b89f8f31ab829f37796ca' 
  AND token = 'ITQnnQeiodkKcPF6Zg4xnDNtQbfnDO3gaJHtOBMyyvo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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