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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '078687ea01a97e7b1c365b844eb9c2c30115b472f67e26694fa64b7fd930f92c' 
  AND token = 'I9Ik86rBxbvzJM5RWJKxtI379Z0t6EIXIPRIClLIlQI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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