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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '41afa66401affeb8b1d2b1bc92a6cfe5c491216a81523358e780882fcd6d3f7b' 
  AND token = 'MAqy6VONJqowJNDhSWU2NYt913R0ioO3hdV5Ycf5E8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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