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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c071499bfb422c2c475ec7e135528eec187552df830ff4e628212a7b57a6829d' 
  AND token = 'G8oIAywQjA+Fu/VT9h28DZVqYh50o78MkS7xI86WsfE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}