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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eac4205691d1e86c24b1b586a0f7958ff4eea759a759e5ede5fd92a7479b0ae8' 
  AND token = 'Izyhq/9ep1r8zYqC9ATuBYu5jYJSHB5TS1kDw3iJzfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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