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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0add239fab3b96ef70d92ff348552f4cdcaa0a6bbcb1034fe925ca7671c0c06e' 
  AND token = '9bh2uawm2YfDnE/gKbz5LYBrePSqcfuaOYtUtvUWnrA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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