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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '2d1e176a0877423f3dfbffc11ceb2c2a11ec94c9fa6d9f6fc6b4141c5891bef0' 
  AND token = 'lvnsrrUL/z1qUHEiB5zHvKatvZIv6KpC7ToaRJ4Dx00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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