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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6464c5990c4cae1d37b4917949bc9b4c1ebcbb8cfec11d9ee55667a01774581d' 
  AND token = 'pb0OtXoNRkU3WipmM144PaRyErhV00f/3PtLe+Pd5oU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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