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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '02565b50357f5e7859f72cd8e6e964e77b3a87ce8c52e22fa3cc5922f5189e86' 
  AND token = 'kiJzP7rkRvsIUG16y6jWfeeK0BkEdrN2PrccLX+t/oU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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