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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9f13d001e79bd525ec1ca9ed669b81c80a85b386461d2483dd8e37ca005f4937' 
  AND token = 'LvAfVblNoDMBQmlomMDXK1vHF9S2RwrvIEw5VDkPae8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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