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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '73d2f65c84b9999cfa2c11d745db1c57d91a626eb7d3694c50c81601cdd3d128' 
  AND token = 'hAi2jP4tzMZucijKlCxsO9xBO/NZOG5i3iBb5NLcPZY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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