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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aae34d5e703ecbf2ec1cc159c0f450c921e3873e6e26e6d41ce813e8f322cad2' 
  AND token = '1D1dZxNPgZEfpxc/vxZhP84i9u9d7pVQlv8cohcaTGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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