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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06d7d0ac60426b74f014cfa33705a5be3a50866c4e07f44c7a24d11f701bdfac' 
  AND token = 'HWwKSUl5JVUyLRHSNBBX68ibls/3NzZ/Nn8ll5DUdeA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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