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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7bde6c85720dda1245bf08a10a6f5fbb21c716d6ab1c8260181baebb9ead394d' 
  AND token = 'SfenJzRFh6w4ooyCSsfXstU2j18O0wsPeOcci2Gl2Qw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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